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24 of 50 (48%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 10 Jan, 2022 @ 11:12am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 8 Jul, 2022 @ 1:35pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 8 Jul, 2022 @ 1:44pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 10 Jan, 2022 @ 11:11am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 13 Jan, 2022 @ 6:18pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 8 Jul, 2022 @ 2:06pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 13 Jan, 2022 @ 5:52pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 14 Jan, 2022 @ 4:23pm

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 9 Jul, 2022 @ 1:45pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 14 Jan, 2022 @ 3:51pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 19 Jan, 2022 @ 12:24pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 19 Jan, 2022 @ 12:22pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 8 Jul, 2022 @ 12:40pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 8 Jul, 2022 @ 12:13pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 20 Jan, 2022 @ 11:30am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 13 Jan, 2022 @ 5:54pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 8 Jul, 2022 @ 12:30pm

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 20 Jan, 2022 @ 11:31am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 8 Jul, 2022 @ 12:26pm

Contest Propellant

Find the snack supply canister.
Unlocked 18 Jan, 2022 @ 11:54am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 18 Jan, 2022 @ 11:52am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 20 Jan, 2022 @ 11:56am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 26 Jun, 2022 @ 7:58pm

Well-Done

Cook a Grenade for too long.
Unlocked 8 Jul, 2022 @ 12:58pm



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Ethically Questionable

Conduct all of the questionable research experiments.

Futile Resistance

Kill 10 Enemies with Snarks.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Permeable Infrastructure

Use the alternate path in Office Complex.

Rare Specimen

Send the Hidden Hat to Xen.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

Universal Gravitation

Get killed by your own Snarks.

Prolific Popper

Kill all Protozoans in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.

Orbital Trajectory

Skip the opening Xen island with a secret jump.​

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.

Gonad Glider

Get whacked into oblivion in the ledge fight.

Post-Mortem Interval

Find each member of the missing research teams.

Laser Immunization

Complete Interloper without taking any laser damage.

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.

Late for Work

Defeat Nihilanth in under 4 minutes.​
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked